Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24791
Title: Equilibrium pathway of spin-coated polymer films
Authors: Tsui, OKC
Wang, YJ
Lee, FK
Lam, C 
Yang, Z
Issue Date: 2008
Publisher: Amer Chemical Soc
Source: Macromolecules, 2008, v. 41, no. 4, p. 1465-1468 How to cite?
Journal: Macromolecules 
Abstract: Spin-coating is a common method of making thin polymer films. Recent experiments show that polymer films produced by this method are highly nonequilibrated. By monitoring the temporal evolution of the surface structure of freshly spin-cast polystyrene films on Si with molecular weights, 2.3 < Mw < 393 kg/mol, we find that the relaxations can be fully accounted for by thermal excitations of surface capillary waves on the film surface. Modeling of the data based on this relaxation scheme leads to excellent agreement between the viscosity of the films and that of the bulk polymers. Our results provide compelling evidence that thickness uniformity is the major cause of the nonequilibration of the films.
URI: http://hdl.handle.net/10397/24791
DOI: 10.1021/ma702374g
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